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Keith_Richards [23]
3 years ago
6

Blood rich in oxygen and nutrients are transported from the placenta to the fetus by the

Biology
1 answer:
Ainat [17]3 years ago
4 0
Dddddddddddddddddddd
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What kinds of muscle is located only in the heart?
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3 years ago
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which of the following would be least likely to happen as a result of a mutation in a person's skin cells?
Dmitriy789 [7]
Its the person's offspring have mutated skin.
because for a mutation to be passed down to an offspring mutation has to happen in the sex cells. so that is the least likely to happen.
since the other may happen for example.
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4 0
3 years ago
Modern Native Americans have very high frequencies of Type O blood. In some places in North and South America, the frequency is
Brilliant_brown [7]

Native Americans and Type O Blood

Modern Native Americans have very high frequencies of Type O blood.

In some places in North and South America, the frequency is as high as 100%. Anthropologists believe that early Native Americans arrived in North America by crossing over the Bering Land Bridge around 15,000 years ago, from East Asia.

Modern East Asian populations, with whom modern Native Americans share ancestry, do not have high frequencies of Type O blood. Instead, they have some of the lowest frequencies of Type O blood in the world.

B. Sickle-Cell Anemia

As many as 20-30% of people living in equatorial Africa have at least one allele on Chromosome 11 that codes for sickle-cell anemia (they have an, "S" rather than an, "A" allele). This is odd because usually, 80% of people who have two S alleles die before they can reproduce,

For each of the following cases:

1. What forces of evolution are at work?  State all that apply.

Mutation

Natural Selection

Genetic Drift

Gene Flow.

Learn more about Anthropologists at

brainly.com/question/13728734

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8 0
2 years ago
In tilman's experiments with diatoms, what was the outcome when the two species competed for silica?
vlada-n [284]
<span>When two different species are competing for a resource in a contained situation, the result is the extinction of the one species or the other.</span>
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3 years ago
Which of the following structures surrounds the cytoplasm in a bacterial cell?
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I'm pretty sure it's the cell membrane.
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